Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes with enhanced selectivity

US10112149B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Raja Swaidan · Belle Bridge, US
• David J. Hasse · Middletown, US
• Madhava R. Kosuri · Newark, US
• Canghai Ma · Newark, US
• Robert A. Gagliano · Cochranville, US
• Henri Chevrel · Tsukuba, JP

Key dates

• Filing date: Jun 30, 2016
• Grant date: Oct 30, 2018
• Expiry date: Jun 30, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2325/28
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes having enhanced selectivity include transition metal cations complexed with electronegative regions of a polyimide. CMS membranes are made by pyrolyzing the metallopolyimide precursor fibers. The cations are introduced by including, in the spin dope composition used to extrude the fibers, either a salt of the transition metal and an inorganic anion or a transition metal/organic ligand complex.